When NDG runs netstat -atupn, the output produces additional unexpected results which cannot be parsed and the remainder of the data will not be captured. To confirm, if the NDG scan is run with detail logging enabled on the profile, the CCA UI Log tab will show the data. Also, by running netstat -atupn on the target machine, you can see the output similar to:
Not all processes could be identified, non-owned process info will not be shown, you would have to be root to see it all.
That is not a standard output from the netstat command, hence NDG is unable to parse the expected netstat return data